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Effectiveness of speed cameras in preventing road traffic collisions and related casualties: systematic review.


ABSTRACT:

Objectives

To assess whether speed cameras reduce road traffic collisions and related casualties.

Design

Systematic review.

Data sources

Cochrane Injuries Group Specialised Register, Cochrane Central Register of Controlled Trials, Medline, Embase, Social Science Citation Index, TRANSPORT database, ZETOC, the internet (including websites of road safety and motoring organisations), and contact with key individuals and organisations.

Main outcome measures

Road traffic collisions, injuries, and deaths.

Inclusion criteria

Controlled trials and observational studies assessing the impact of fixed or mobile speed cameras on any of the selected outcomes.

Results

14 observational studies met the inclusion criteria; no randomised controlled trials were found. Most studies were before-after studies without controls (n = 8). All but one of the studies showed effectiveness of cameras up to three years or less after their introduction; one study showed sustained longer term effects (4.6 years after introduction). Reductions in outcomes across studies ranged from 5% to 69% for collisions, 12% to 65% for injuries, and 17% to 71% for deaths in the immediate vicinity of camera sites. The reductions over wider geographical areas were of a similar order of magnitude.

Conclusions

Existing research consistently shows that speed cameras are an effective intervention in reducing road traffic collisions and related casualties. The level of evidence is relatively poor, however, as most studies did not have satisfactory comparison groups or adequate control for potential confounders. Controlled introduction of speed cameras with careful data collection may offer improved evidence of their effectiveness in the future.

SUBMITTER: Pilkington P 

PROVIDER: S-EPMC548724 | biostudies-literature | 2005 Feb

REPOSITORIES: biostudies-literature

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Publications

Effectiveness of speed cameras in preventing road traffic collisions and related casualties: systematic review.

Pilkington Paul P   Kinra Sanjay S  

BMJ (Clinical research ed.) 20050114 7487


<h4>Objectives</h4>To assess whether speed cameras reduce road traffic collisions and related casualties.<h4>Design</h4>Systematic review.<h4>Data sources</h4>Cochrane Injuries Group Specialised Register, Cochrane Central Register of Controlled Trials, Medline, Embase, Social Science Citation Index, TRANSPORT database, ZETOC, the internet (including websites of road safety and motoring organisations), and contact with key individuals and organisations.<h4>Main outcome measures</h4>Road traffic c  ...[more]

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